Patent EA-004481-B1 (EA)
Title: Device for screwing in magazine-fed fastening elements
Inventor: GASSER DANIEL
IPC: B25B23/04
Filed: 2002-01-21
Abstract: 1. A device for screwing in magazine-fed fastening elements that consists of a large area washer and a tubular extension forming a plastic retainer (13), wherein between the magazine for the plastic retainers (13) and feeding elements (10) for feeding the plastic retainers (13) to the position of screwing, a picking system (16) is provided, said picking system (16) comprises a double-crank arm and configured by a lever (17) that can be swiveled about an axis (19) extending across the feed direction the lever arm located behind in the direction of plastic retainer feed has a fixed elongated part locking the lever in the initial position preventing the feed channel for feeding plastic retainers from the magazine, characterized in that the arm lever in its free end zone comprises a spring-loaded thrust portion (23) adapted to be pushed back, the thrust portion enters then into the feed channel (22) for feeding plastic retainers (13), when the elongated portion (26) of the lever arm (21) is disengaged from its locking initial position. 2. The device according to claim 1, characterized in that the spring-loaded thrust portion (23) of the lever arm (20) adapted to be pushed back is designed as a pin moved to its initial position by a spring. 3. The device according to claim 1 or 2, characterized in that the thrust portion (23) with its free end directed to the feed channel (22) is in the extended initial position so that even with small lever (17) turn, said thrust portion inters into the feed channel. 4. The device according to any one of claims 1 to 3, characterized in that the distance between the fixed elongated portion (26) and a loaded spring drawn out be the thrust portion (23) greater than the width of the large area washer (24) of the plastic retainer (13) measured in the direction (18) of the feed channel feeding so that when the lever turning motion starts and the elongated portion (26) on the other lever arm keeps the passage in the feed channel open, the thrust portion (23) presses upon the surface (29) of next plastic retainer (13). 5. The device according to any one of claims 1 to 4, characterized in that the thrust portion (23)on its free end is rounded and/or having a facet. 6. The device according to any one of claims 1 to 5, characterized in that the spring retains the lever (17) in its initial position, in which the elongated portion (26) arranged in the back position in the direction of the lever (17) arm feed enters into the feed channel (22). 7. The device according to any one of claims 1 to 6, characterized in that the lever (17) has a thrust surface (31) on the side opposite to the elongated portion (26) and the thrust portion (23) for resting a control element (32) adapted to move when the device is fed. 8. The device according to claim 7, characterized in that the thrust surface of the (31) of the lever (17) and the thrust surface (33) of the control element (32) in a corresponding initial position have inclined surfaces directed parallel to each other, which, when drawing relative each other get in contact with each other. 9. The device according to any one of claims 1 to 8, characterized in that the picking system (16) is adapted to mount a magazine (15) thereon for preseparation of plastic retainers (13). 10. The device according to any one of claims 1 to 9, characterized in that fastening elements consist of a large area washer and a tubular extension forming a plastic retainer (13), a magazine is provided for retaining in a proper position and arrangement enabling to move plastic retainers with tubular extensions, the magazine is designed as C-shaped profile with an open zone for passing extensions of the plastic retainers, wherein a feed channel for directional arrangement of large area washers is provided in the inner profile zone, wherein the feed channel (22) is limited in the inner profile zone (34) by a guide partition (36) and by guide rails (37, 38), the guide rails (37, 38) are spaced from each other on both sides of the open zone (36). 11. The device according to claim 10, characterized in that the guide partition (36) is designed in the form of a reinforced profile (34) back wall. 12. The device according to any one of claims 10 or 11, characterized in that the magazine (15) forming profile (34) can be mounted on the device by engaging and blocking. 13. The device according to claim 10, characterized in that the guide partition (36) or the guide rails (37, 38) are provided with cavities and protrusions in accordance with cavities and protrusions made in the device (1). 14. The device according to any one of claims 12 or 13, characterized in that a fastening plate (45) for engaging and blocking with a geometric engagement on the device (1) is provided on the magazine underside for fixing the position and blocking between the magazine (15) and the device (1). 15. The device according to any one of claims 10 to 14, characterized in that the magazine (15) comprises in both end zones locking elements (39, 40) for retaining installed plastic retainers (13) without falling them out. 16. The device according to claim 15, characterized in that the locking elements (39, 40) are installed to displace transversely to the longitudinal profile (34) direction in closing/opening position. 17. The device according to any one of claims 10 to 16, characterized in that the magazine (15) is adapted to be connected to the picking system (16) mounted or arranged on the device (1). 18. The device according to any one of claims 10 to 17, characterized in that the magazine (15) is formed by profile (14) in a straight way, the magazine (15) forms a sharp angle (W) with the screwing direction.